Chromasens CD40127_R02 allPIXA_pro_User Manual.docx
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The following image shows an example of an inserted ROI:
9.9.6 Input debouncing speed (Frame trigger)
To trigger images from an external source, the signal of the frame trigger, for example from a
light barrier, must be connected to the hardware ports of the camera; this could be done by
means of the frame grabber using CC-bits, the D-Sub 15 IO port on the camera, or internal
frame trigger. For more information about an internal frame trigger, see section 9.9.5.
This external signal must be connected to the internal function (frame trigger) with the IO
configuration. See 8.10.
The single inputs have different properties regarding the debouncing speed.
Name
Name
Input debouncing speed for the frame trigger
Function
Selects the different debouncing speeds to be used for the frame trigger input
Channels
All
Unit
Time, see below
Dependency
Only active if
Use start condition only
or
Use start and stop condition
is
selected.
The external frame trigger input must selected with the IO configuration.
Notes
The frame trigger for the camera neede to be, depends on the parameter, at
leest 6 to 10 lines stable.
Camera
Value
All
Peakholder (LB2)
All
50 ns (LB1)
All
4 image lines (LB3)
All
60 image lines (LB0)
By using this option you can select the debouncing speed of the frame tigger.
There are different methods for debouncing the signal:
Peakholder: no debouncing, peak holder
Fast:
4 clock pulses
~ 50 ns
Middle:
4 output lines
Very long: 60 output lines
Examples:
If you use the zero output of an encoder, which is usually 1/4 of a encoder step, you
must lengthen this pulse to enable the camera to use it as a frame trigger.
Therefore you must set the debouncing to
Peakholder
.
In this case every short "peak" is held for 10 camera lines.
